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What does planetary nebula mean?

April 26, 2017mean nebula Planetary

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What does planetary nebula mean?

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• PLANETARY NEBULA (noun) The noun PLANETARY NEBULA has 1 sense: 1. a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star Familiarity information: PLANETARY NEBULA used as a noun is very rare.